caa a22 4500 463225112 CHVBK 20180405153224.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0660-0 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0660-0 Co-precipitation synthesis of Nd:YAG nano-powders: the effect of Nd dopant addition with thermal treatment [Elektronische Daten] [Eugenio Caponetti, Maria Saladino, Filomena Serra, Stefano Enzo] Nanopowders of Yttrium Aluminium Garnet doped with neodymium ions were obtained by the co-precipitation method from the reaction of aluminium, yttrium and neodymium nitrate with ammonia. The amount of neodymium was selected in order to produce samples of nominal stoichiometry NdXY(3-X)Al5O12 (where X=0.006, 0.012, 0.024, 0.048, 0.081, 0.096, 0.17, 0.19, 0.38, 0.54, and 0.72, respectively). After washing and drying, the hydroxide precursors were subjected to Thermo-Gravimetry and Differential Thermal Analysis experiments from room temperature up to 1500°C, which showed the presence of exothermal events accompanying phase transformation phenomena. X-ray diffraction investigations conducted with a high-resolution powder diffractometer on the specimens arrested at selected temperature of the thermograms, evidenced the amorphous-to-crystalline transformation phenomena leading to the garnet phase as the main product. On increasing the concentration of Nd, the presence of the monoclinic Y4Al2O9 phase was also detected together with a variable amount of a metastable hexagonal YAlO3 phase. Precise determination of the cubic garnet lattice parameters as a function of the neodymium content according to the Rietveld method shows a change from the value of 12.016 (±2) Å when X=0 up to 12.128 (±2) Å for X=0.720 with two distinctive regimes of increase. The line broadening analysis of X-ray profiles after correction for instrumental factors indicates that the average crystallite size is in the range 50-80nm. Field-Emission Gun-Scanning Electron Microscopy observations showed the presence of aggregation features in the powders with a rounded morphology and a relatively uniform and narrow particle size distribution, with the average size figures in substantial agreement with the diffraction analyses. Springer Science+Business Media, LLC, 2007 Caponetti Eugenio Dipartimento di Chimica Fisica and INSTM-Udr Palermo, Viale delle Scienze, Parco D'Orleans II pad.17, 90128, Palermo, Italy aut Saladino Maria Dipartimento di Chimica Fisica and INSTM-Udr Palermo, Viale delle Scienze, Parco D'Orleans II pad.17, 90128, Palermo, Italy aut Serra Filomena Dipartimento di Chimica and INSTM-Udr Sassari, University of Sassari, via Vienna n. 2, 07100, Sassari, Italy aut Enzo Stefano Dipartimento di Chimica and INSTM-Udr Sassari, University of Sassari, via Vienna n. 2, 07100, Sassari, Italy aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4418-4427 0022-2461 42:12<4418 2007 42 10853 https://doi.org/10.1007/s10853-006-0660-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0660-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Caponetti Eugenio Dipartimento di Chimica Fisica and INSTM-Udr Palermo, Viale delle Scienze, Parco D'Orleans II pad.17, 90128, Palermo, Italy aut NATIONALLICENCE 700 1- Saladino Maria Dipartimento di Chimica Fisica and INSTM-Udr Palermo, Viale delle Scienze, Parco D'Orleans II pad.17, 90128, Palermo, Italy aut NATIONALLICENCE 700 1- Serra Filomena Dipartimento di Chimica and INSTM-Udr Sassari, University of Sassari, via Vienna n. 2, 07100, Sassari, Italy aut NATIONALLICENCE 700 1- Enzo Stefano Dipartimento di Chimica and INSTM-Udr Sassari, University of Sassari, via Vienna n. 2, 07100, Sassari, Italy aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4418-4427 0022-2461 42:12<4418 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer